Script not performed by Extension on first page visit

[Morku]

Issue Details

• AdGuard version:
  • AdGuard for iOS v4.3.2(938)
• Device model and storage size:
  • iPhone Xs Max 64GB
• Operating system and version:
  • 15.3
• Browser or App:
  • Safari

Preparation

My Safari is always in private mode. No Cache or Cookies are stored on the phone. Every Tab or Safari season starts "clean". I have a premium license active, I subscribed to following AdGuardfilters: Base, Mobile, Social, Annoyance, German The 'extended protection' (Extension) is enabled and active for all Tabs.

Actual Behavior

1. Start Safari
2. Go to https://www.google.de/
3. Notice that Cookie Pop-up is not blocked
4. Reloading the page fix the issue
5. Close the Tab and Safari
6. Start Safari again
7. Visit https://www.google.de/ again -> Cookie Pop-up

The same happen like for https://www.youtube.com/ or https://www.videogameschronicle.com/

• If you open any other page before and than go to Google/Youtube/VGC -> there is no Cookie Pop-up, filtering works fine
• It seems like only happen for the first page you visit with Safari. Like the Extension gets enabled to late (hopefully no iOS Bug or limitation)
• The Google/YouTube/VGC Scriptlets seems to begin with #%#(function() and maybe it's only this which get stuck in first visit load
• Other new Blocking methodes with the Extension like Element hiding #?# are working fine on first visit

Video

Video:

https://user-images.githubusercontent.com/6276915/152859195-943aa644-dc0d-413a-848b-c7439f08762c.mp4

In this Video I show you:

Open Safari -> visit Google -> Cookie Pop-up -> Reload -> No Cookie Pop-up -> Close Tab and Safari -> Open Safari -> Open Videogameschronicles -> Cookie Pop-up -> Reload -> No Cookie Pop-up -> CLose Tab and Safari -> Open Safari -> Visit Videohelp (which contain a Element Hiding rule which works fine after a short second. It's that Textline with Streamfab Ad) -> open Google (as second page) -> no Cookie Pop-up -> open Videogameschronicles -> no Cookie Pop-up

Hope it makes sense.

[ameshkov]

It seems like only happen for the first page you visit with Safari. Like the Extension gets enabled to late (hopefully no iOS Bug or limitation)

It takes 300-400ms to initialize and we're quite limited in what we can do about that since most of this time is spent by Safari itself. And for the current anti-cookie rules for Google, the order of execution is very important.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[artemiv4nov]

The task is in the tasks queue, please await for updates.

[Versty]

Same issue https://github.com/AdguardTeam/AdguardForiOS/issues/2032